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Goodwill and Identifiable Intangible Assets - Summary of Changes in Net Carrying Amount Goodwill By Segment (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Goodwill [Roll Forward]
Balance at December 31, 2022	$ 671.5
Foreign currency translation	(6.7)
Balance at September 30, 2023	664.8
ACCO Brands North America
Goodwill [Roll Forward]
Balance at December 31, 2022	348.0
Foreign currency translation	0.0
Balance at September 30, 2023	348.0
ACCO Brands EMEA
Goodwill [Roll Forward]
Balance at December 31, 2022	145.6
Foreign currency translation	(7.5)
Balance at September 30, 2023	138.1
ACCO Brands International
Goodwill [Roll Forward]
Balance at December 31, 2022	177.9
Foreign currency translation	0.8
Balance at September 30, 2023	$ 178.7

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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